Iron ore hematite is concentrated using ____________________?

Related Mcqs:

1. Which is the main reducing agent during production of iron from iron ore in a blast furnace ?

   A. C
   B. CO
   C. CO2
   D. H2

2. Pig iron is produced by blast furnaces in India using mostly the iron ore named _______________?

   A. Hematite
   B. Magnetite
   C. Siderite
   D. Chalcopyrite

3. ______________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace?

   A. Bauxite
   B. Limestone
   C. Quartz
   D. Manganese

4. Ore concentration by froth floatation utilises the ______________ of ore particles ?

   A. Density difference
   B. Wetting characteristics
   C. Terminal velocities
   D. None of these

5. Which of the following is an ore of iron ?

   A. Galena
   B. Chalcopyrite
   C. Hematite
   D. Bauxite

6. A mineral is termed as ‘ore’, if ____________________?

   A. A metal can be economically extracted from it
   B. It contains ≥ 40% metal
   C. The metal present in it is costly
   D. All A , B. and C.

7. Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?

   A. Reduction
   B. Roasting
   C. Calcination
   D. Smelting

8. ___________________ iron is the purest form of iron?

   A. Cast
   B. Wrought
   C. Pig
   D. High silicon

9. ______________ is an ore of lead?

   A. Quartz
   B. Galena
   C. Siderite
   D. Chalcopyrite

10. ______________ is an ore concentrating metallurgical process involving a chemical change?

    A. Electromagnetic separation
    B. Froth floatation
    C. Roasting
    D. None of these